To be fair, personally I'm comfortable @adrn not adding the baseline rcParam here - it will take more time to investigate that that is the correct behaviour, and we don't even have an end user who has highlighted this as a problem.

@tacaswell - having already invested some time in looking at the prospect of using ```set_title``` in the ```cla``` method, are you prepared to accept this change, and optionally have a follow on PR which addresses this existing bug?